This work aims to study corrosion resistance of graphene/sodium metavanadate/organic silicone modified resin composite coating on carbon steel plate. Functionalized graphene of stable water dispersibility was synthesized in polymer-assisted electrochemical method and then added sodium metavanadate/organic silicone modified resin coating for surface anticorrosion of carbon steel plate. Structure and water dispersibility of the graphene were characterized with transmission electron microscopy, Raman spectroscopy and nanoparticle size analyzer. Corrosion resistance of the graphene/sodium metavanadate/organic silicone modified resin composite coatings were studied with Tafel curve, electrochemical impedance and copper sulfate dripping test. The results of transmission electron microscopy and Raman spectroscopy demonstrated successful preparation of graphene. Zeta potential of SMA-graphene was about ?50 mV, which endowed the graphene with excellent water dispersibility. Compared with sodium metavanadate/organic silicone modified resin coating, corrosion current density of the coating containing grapheme decreased sharply to 0.554×10?6 A/cm2 when the graphene content was 0.10%. In the electrochemical impedance test, the composite coating containing 0.10% graphene had the maximum impedance and exhibited excellent corrosion resistance. Corrosion resistance of the graphene/sodium metavanadate/organic silicone modified resin composite coating were enhanced with the addition of prepared graphene as barrier property of the improved corrosive medium (water and oxygen) is improved.